Keyboard



FIG. 1 is a perspective view of a keyboard showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof shown in an operative state.

The broken lines of all the figures are for the purpose of illustrating environment and form no part of the claimed design. 

The ornamental design for a keyboard, as shown and described. 